A61F 2/1659

Having variable absorption coefficient for electromagnetic radiation

Official title: {having variable absorption coefficient for electromagnetic radiation, e.g. photochromic lenses}

A61F2/1659 (Having variable absorption coefficient for electromagnetic radiation) appears on 145 US grants and 180 published applications in this corpus.

Search patents in A61F
Granted patents
145
Published applications
180
Assignees
59
Inventors
224
Latest grant
18 Aug 2026

Filings by year

A61F 2/1659: granted patents and published applications per publication year
YearGranted patentsPublished applications
197920
198000
198100
198200
198300
198400
198500
198600
198700
198800
198900
199000
199100
199200
199300
199410
199510
199620
199710
199810
199900
200000
200100
200212
200316
200403
200557
200624
200744
200823
200915
201026
201137
201267
201335
201448
2015311
2016718
20171514
20181613
2019199
202079
2021813
202295
202358
202457
202564
202632

By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.

Recent patents

Most cited

By later US patents